1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/string.h>
12 #include "subcmd-util.h"
16 void add_cmdname(struct cmdnames *cmds, const char *name, size_t len)
18 struct cmdname *ent = malloc(sizeof(*ent) + len + 1);
23 memcpy(ent->name, name, len);
26 ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc);
27 cmds->names[cmds->cnt++] = ent;
30 void clean_cmdnames(struct cmdnames *cmds)
34 for (i = 0; i < cmds->cnt; ++i)
35 zfree(&cmds->names[i]);
41 int cmdname_compare(const void *a_, const void *b_)
43 struct cmdname *a = *(struct cmdname **)a_;
44 struct cmdname *b = *(struct cmdname **)b_;
45 return strcmp(a->name, b->name);
48 void uniq(struct cmdnames *cmds)
55 for (i = 1; i < cmds->cnt; i++) {
56 if (!strcmp(cmds->names[i]->name, cmds->names[i-1]->name))
57 zfree(&cmds->names[i - 1]);
59 for (i = 0, j = 0; i < cmds->cnt; i++) {
64 cmds->names[j++] = cmds->names[i];
69 cmds->names[j++] = NULL;
72 void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
78 while (ci < cmds->cnt && ei < excludes->cnt) {
79 cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);
85 zfree(&cmds->names[cj]);
86 cmds->names[cj++] = cmds->names[ci++];
88 } else if (cmp == 0) {
96 while (ci < cmds->cnt) {
97 zfree(&cmds->names[cj]);
98 cmds->names[cj++] = cmds->names[ci++];
101 for (ci = cj; ci < cmds->cnt; ci++)
102 zfree(&cmds->names[ci]);
106 static void get_term_dimensions(struct winsize *ws)
108 char *s = getenv("LINES");
111 ws->ws_row = atoi(s);
112 s = getenv("COLUMNS");
114 ws->ws_col = atoi(s);
115 if (ws->ws_row && ws->ws_col)
120 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
121 ws->ws_row && ws->ws_col)
128 static void pretty_print_string_list(struct cmdnames *cmds, int longest)
131 int space = longest + 1; /* min 1 SP between words */
136 get_term_dimensions(&win);
137 max_cols = win.ws_col - 1; /* don't print *on* the edge */
139 if (space < max_cols)
140 cols = max_cols / space;
141 rows = (cmds->cnt + cols - 1) / cols;
143 for (i = 0; i < rows; i++) {
146 for (j = 0; j < cols; j++) {
147 unsigned int n = j * rows + i;
148 unsigned int size = space;
152 if (j == cols-1 || n + rows >= cmds->cnt)
154 printf("%-*s", size, cmds->names[n]->name);
160 static int is_executable(const char *name)
164 if (stat(name, &st) || /* stat, not lstat */
165 !S_ISREG(st.st_mode))
168 return st.st_mode & S_IXUSR;
171 static int has_extension(const char *filename, const char *ext)
173 size_t len = strlen(filename);
174 size_t extlen = strlen(ext);
176 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
179 static void list_commands_in_dir(struct cmdnames *cmds,
184 DIR *dir = opendir(path);
192 prefix_len = strlen(prefix);
194 astrcatf(&buf, "%s/", path);
196 while ((de = readdir(dir)) != NULL) {
199 if (!strstarts(de->d_name, prefix))
202 astrcat(&buf, de->d_name);
203 if (!is_executable(buf))
206 entlen = strlen(de->d_name) - prefix_len;
207 if (has_extension(de->d_name, ".exe"))
210 add_cmdname(cmds, de->d_name + prefix_len, entlen);
216 void load_command_list(const char *prefix,
217 struct cmdnames *main_cmds,
218 struct cmdnames *other_cmds)
220 const char *env_path = getenv("PATH");
221 char *exec_path = get_argv_exec_path();
224 list_commands_in_dir(main_cmds, exec_path, prefix);
225 qsort(main_cmds->names, main_cmds->cnt,
226 sizeof(*main_cmds->names), cmdname_compare);
231 char *paths, *path, *colon;
232 path = paths = strdup(env_path);
234 if ((colon = strchr(path, ':')))
236 if (!exec_path || strcmp(path, exec_path))
237 list_commands_in_dir(other_cmds, path, prefix);
245 qsort(other_cmds->names, other_cmds->cnt,
246 sizeof(*other_cmds->names), cmdname_compare);
250 exclude_cmds(other_cmds, main_cmds);
253 void list_commands(const char *title, struct cmdnames *main_cmds,
254 struct cmdnames *other_cmds)
256 unsigned int i, longest = 0;
258 for (i = 0; i < main_cmds->cnt; i++)
259 if (longest < main_cmds->names[i]->len)
260 longest = main_cmds->names[i]->len;
261 for (i = 0; i < other_cmds->cnt; i++)
262 if (longest < other_cmds->names[i]->len)
263 longest = other_cmds->names[i]->len;
265 if (main_cmds->cnt) {
266 char *exec_path = get_argv_exec_path();
267 printf("available %s in '%s'\n", title, exec_path);
268 printf("----------------");
269 mput_char('-', strlen(title) + strlen(exec_path));
271 pretty_print_string_list(main_cmds, longest);
276 if (other_cmds->cnt) {
277 printf("%s available from elsewhere on your $PATH\n", title);
278 printf("---------------------------------------");
279 mput_char('-', strlen(title));
281 pretty_print_string_list(other_cmds, longest);
286 int is_in_cmdlist(struct cmdnames *c, const char *s)
290 for (i = 0; i < c->cnt; i++)
291 if (!strcmp(s, c->names[i]->name))